this time, the third and fourth disks are idle. When B data is written to the third Disk in a certain band, and B data is checked in the fourth disk, in this way, both data a and data B can be read and written at the same time.
VII. Raid 6
Raid 6 adds a verification area on the basis of RAID 5, each of which has two verification areas. They use an unused verification algorithm to improve data reliability.
Next we will introduce several types of combined raid
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Layer-3 cainiao
Layer-3 prawns
Layer-3 cool man
Program 10 floors
Since the western Renaissance, China lags behind the West in natural science, and the software field is no exception. Of course, many programmers in China may have many different opinions on this. Some people think
DescribeFor resistors with resistance of R1 and R2, the parallel resistor resistance formula is calculated as follows:R = 1/(1/R1 + 1/r2)Input two resistor impedance size, floating point, separated by a space. The impedance after the output is in parallel, the result is 2-bit sample input after the decimal point is retained1 2Sample output0.67Hint that the calcul
the caller's stack frame. Where our function is to get the value of the current stack frame EBP register, and the return address in the caller's stack frame, the input parameters passed to the current stack frame.So, according to the distribution of the data in the graph, we can know that the value of the register EBP is the highest address of the current stack frame, and that the memory unit that corresponds to the highest address is exactly the highest address of the caller's stack frame.The
possibleMake sure that some attributes can inherit the parent rather than overwrite the parent;A simple example:
test jb51
test jb51
In fact, I want jb51 to inherit the default attributes, because those attributes already exist.In addition, we should pay attention to a few of the issues that are not particularly important. The impacts are not as big as those above:6. the CSS path should not be too deep;For example:Program code
#jb51 #info #tool #sidebar h2{ font-size:12px;}
7. Some of them ca
The sum of factorialEnter N, calculate s=1! +2! +3! + ... +n! The last 6 bits (excluding the leading 0). N≤10 6, n! SaidThe product of the first n positive integers.Sample input:10Sample output:Package Demo;import Java.util.scanner;public class Demo02 {public static void main (string[] args) {Scanner in=new Scanner ( system.in); int n=in.nextint (); Long sum=0;fo
end.A PHP is also defined in 111.com[Email protected] ~]# vim/data/wwwroot/111.com/index.php[Email protected] ~]#/usr/local/apache2.4/bin/apachectl-tsyntax ok[[email protected] ~]#/usr/local/apache2.4/bin/ Apachectl Gracefulif the domain name configuration is not found, the default virtual host configuration file is found, for example www.111.com in the configuration file does not have this domain name or alias, so directly find the default configuration, that is, the first paragraph, so it is
DTD syntax1. Element Element constraint: A list of child elements, enclosing the child elements that can be contained in parentheses, with the child elements, the interval indicating that the order of occurrence must be consistent with the Declaration;Element content can be used +,*,? and other symbols to indicate the number of occurrences of the element: +: One or more times, *:0 or multiple times;?: 0 times or once;You can also use parentheses for group operations;2. Properties16-
This article
Article I mainly wrote about the CSS section that improves the rendering speed of web pages on the client browser, and summarized 10 items for the time being.
1. Try to avoid * {}# jb51 * {}
Because different browsers have different interpretations of HTML tags, the final web page effect may be different in different browsers. to eliminate this risk, designers usually remove all the defa
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